Magic Land is a small amusement park just off Dakar's Corniche Ouest, useful if you are travelling with children and need a break from museums, markets, and city traffic. Expect a local, slightly worn-in park rather than a polished theme-park machine: rides, simple games, snack stands, and the beach and Casino Terrou-Bi close by.
It is best treated as a family diversion, not one of Dakar's headline sights. Go in daylight, keep expectations modest, and combine it with a walk along the Corniche.